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Linux Util

Console Multi-tasking

screen -ls
ctrl-a D
GNU Screen is the granddaddy of these programs, but tmux and dvtm+dtach are other solutions you may prefer
http://www.howtogeek.com/111417/how-to-multitask-in-the-linux-terminal-3-ways-to-use-multiple-shells-at-once/
http://www.howtogeek.com/114582/2-alternatives-to-gnu-screen-for-linux-terminal-multitasking/
http://www.howtogeek.com/58487/how-to-easily-multitask-in-a-linux-terminal-with-byobu/